FROM Crown Literature:

The following applies to units in Stereo mode with 8-ohm loads and
an input sensitivity of 26 dB gain unless otherwise specified.

• Standard 1 kHz Power: refers to maximum average power in watts at 1 kHz with 0.1% THD.
• Full Bandwidth Power: refers to maximum average power in watts from 20 Hz to 20 kHz with 0.1% THD.

Performance

• Frequency Response: ±0.1 dB from 20 Hz to 20 kHz at 1 watt (see Figure 6.7).
• Phase Response: ±10 degrees from 10 Hz to 20 kHz at 1 watt (see Figure 6.10).
• Signal-to-Noise Ratio: 20 Hz to 20 kHz: Better than 100 dB below full bandwidth power. A-weighted: Better than 105 dB below full bandwidth power.
• Total Harmonic Distortion (THD): Less than 0.05% at full bandwidth power from 20 Hz to 1 kHz increasing linearly to 0.1% at 20 kHz.
• Intermodulation Distortion (IMD): (60 Hz, 7 kHz) Less than 0.05% from 163 milliwatts to full bandwidth power.
• Damping Factor: Greater than 1,000 from 10 Hz to 400 Hz
• Crosstalk: See Figures 6.11, 6.12 and 6.13.
• Slew Rate: Greater than 13 volts per microsecond.
• Voltage Gain: 20:1 ±3% or 26 dB ±0.25 dB at the maximum level setting (also see Section 4.4).
• Macro-Tech 600: 54:1 ±12% or 35 dB ±0.5 dB at 0.775 volt
• sensitivity; 30:1 ±12% or 30 dB ±0.5 dB at 1.4 volt sensitivity.

Power

• Output Power: The following are guaranteed minimums for standard 1 kHz power from 120 VAC, 60 Hz North American units.

Macro-Tech 600 Stereo mode (both channels driven):

• 400 watts into 2 ohms.
• 325 watts into 4 ohms.
• 220 watts into 8 ohms.

Bridge-Mono mode:

• 750 watts into 4 ohms.
• 655 watts into 8 ohms.
• 450 watts into 16 ohms.

Parallel-Mono mode:

• 700 watts into 1 ohm.
• 665 watts into 2 ohms.
• 450 watts into 4 ohms.

Indicators

Enable: This amber front panel indicator shows the on/off status of the low-voltage power supply.
Signal/IOC: Each channel has a green front panel indicator that flashes to show amplifier output. If a channel’s output waveform differs from its input by 0.05% or more, the indicator flashes brightly to show distortion. This function provides proof of distortion-free performance. In Parallel-Mono mode, the Channel 2 light stays on (see Section 4.2).
ODEP: Each channel has an amber front panel indicator that shows thermal-dynamic energy reserve. Normally, each ODEP indicator is lit to show available reserve energy. In the rare event that a channel has no reserve, its indicator will dim in proportion to ODEP limiting. An ODEP indicator may also turn off under other conditions (see Section 4.2).
 

Input/Output

• Input Connector: Two balanced 1/4-inch phone jacks on the back panel and two balanced three-pin female XLR connectors on the factory-installed P.I.P.- FX (see Section 8 for information on optional PIP modules).
• Input Impedance: Nominally 20 k ohms, balanced. Nominally 10 k ohms, unbalanced.
• Input Sensitivity: Settings include 0.775 volts or 1.4 volts for standard 1 kHz power, or a 26 dB voltage gain (see Section 4.4 for more information).
• Output Connectors: Two sets of color-coded 5-way binding posts (for banana plugs, spade lugs or bare wire).
• Output Impedance: Less than 10 milliohms in series with less than 2 microhenries (see Figure 6.9).
• DC Output Offset: (Shorted input) ±10 millivolts